Elastic-Plastic Non Linear Behaviors of Suddenly Loaded Structures | Science Publications

American Journal of Engineering and Applied Sciences

Assal T. Hussein¹ 

关键词: Elastic-plastic analysis;    non-linear;    suddenly load;    ASI technique;    framed structures;    numerical integration point;    increment vector;    Finite Element Method (FEM);   

DOI  :  10.3844/ajeassp.2011.89.92

学科分类：工程和技术（综合）

来源: Science Publications

【 摘 要 】

Problem statement: The adaptively shifted integration technique was applied to the elasticplasticanalysis of framed structures under dynamic loading. Approach: This study used analysis oflinear beam element, the reshifting of the of the integration points in the element is conducted in orderto attain higher accuracy. Results: In nonlinear finite element analysis by the ASI technique, thehighest computational efficiency has been achieved by shifting the numerical integration points forevaluation of stiffness matrices of linear Timoshenko beam element. A computer program has beenWritten by VBASIC for solve the problem of the steel frame, results of numerical examplesdemonstrate the validity of the computer program and study many parametric study, such as Time stepand Mass of the structure. Conclusion/Recommendations: In the elastic analysis there is nodistinction between the ASI technique and the conventional finite element method, but for elasticplasticnonlinear analysis under dynamic load Adaptive Shifted Integration (ASI) technique is capableof predicting with reasonable accuracy the behavior of steel frame structures.

【 授权许可】

Unknown